他的面容因疲倦而委顿。

His face sagged with weariness.

每日喝足水，能防止产生精神委顿。

Drinking enough water each day can prevent you from feeling lethargic.

但这是不可能的，因为前排委顿无力地坐着一个名叫泰迪。史塔特的小男孩。

But that was impossible, because there in the front row, slumped in his seat, was a little boy named Teddy Stoddard.